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(No Model.)

H. A. BATES 85 W. H. BARNETT. SHUTTLE FOR SEWING MACHINES No. 515,187.Patented Feb. 20.1894.

UNITE STATES rib.

HENRY A. BATES, OF YONKERS, NEW YORK, AND WILLIAM H. BARNETT, OF NEWARK,NEW JERSEY, ASSIGNORS TO SAID BATES.

SHUTTLE FOR SEWlNG-MACHlNES.

SPECIFICATION forming part of Letters Patent No. 515,187, dated February20, 1894.

Application filed September 14,1893. Serial No. 485,463; (No model.)

To aZZ whom it may concern;

Be it known that we, HENRY A. BATEs, of Yonkers, in the county ofWestchester and State of New York, and WILLIAM H. BARNETT, of Newark, inthe county of Essex and State of New Jersey, citizens of the UnitedStates, have invented an Improvement in Sewing Machine Shuttles, ofwhich the following is a specification.

In sewing machine shuttles a bobbin has been made use of made with ametallic tube and thin metallic heads, between which the thread iswound, and in other instances the threadhas been wound upon a paper tubeand the bobbin inserted intothe shuttle. With the metallic bobbin thereis considerable wear in consequence of the rotation of the metallicbobbin within the shuttle as the thread is drawn off, and in cases wherethe thread has been wound upon a paper tube, there is con-.

siderable risk of the thread becoming entangled around the pin or axisthat sustains the thread bobbin. This arises principally from the threadbobbin turning loosely within the shuttle and by its momentum continuingto revolve in consequence of the speed imparted to the bobbin by drawingoff the thread in the sewing operation.

The object of the present improvement is to adapt the ordinary shuttlethat has been provided with a metallic bobbin, to the reception of athread bobbin wound on a tube and to apply to such thread bobbin afriction that will prevent the bobbin turning loosely and the threadbecoming slack and entangled around the pin that sustains the paper tubeand the thread bobbin.

In the drawings, Figure 1 is an elevation of a sewing machine shuttlecontaining the present improvements. Fig. 2 is a cross section of thesame, and Fig. 3 is a detached view of the friction spring, the axis ofthe bobbin being in section, and both figures are drawn on an enlargedscale to more clearly represent the present improvements.

The shuttle is of any desired character; we have represented a shuttlecorresponding to that known as the Singer oscillating shuttle, and thesame is made in two parts A and B hinged together so as to be opened forpassing in the thread bobbin. In shuttles of this character, the metalbobbin is usually received into the circular cavity, its edges beingagainst the annular ledges or offsets. In our present improvements weapply into both the openings, disks, the edges of which arecomparatively thin and flexible and of slightly larger diameter than theopenings in the parts A. B. of the shuttle so that such disks willremain in position by the friction of their edges when pressed into thecavities, and the pin 2. projects from one of said disks. The bobbinfriction spring 4 is made with an opening, so that such spring mayreceive through it the pin 2, and there are projecting ends 5 extendingoutwardly from the ring portion of the spring and bearing against theinner surface of the shuttle. This spring is made of thin sheet metal,and the ends 5 are curved to bear against the interior surface of theshuttle and cause the central or ring portion of the spring topress-against one end of the bobbin of thread or its tube. We have shownthe bobbin tube 6 as containing the thread 7 that is wound around thebobbin tube, and such bobbin tube is advantageously made of paper, andthe spring 4E acting against the end of the bobbin or tube appliessufficient friction to the same to hold the bobbin and prevent inrevolving by momentum as the thread is drawn off, and thereby apply tothe bobbin thread a slight tension as it passes from the shuttle so asto insure the proper drawing off of the thread without the risk of thesame becoming looped or entangled within the shuttle. It is advantageousto make the pin 2 with a neck adjacent to the disk at the side of theshuttle to which such pin is permanently fastened, and this neck is of asize for the ring portion of the bobbin spring 4 to fit around the samefreely, and the length of the neck is sufficient for the properexpansion of the spring in acting against the end of the bobbin ortube,but the shoulder adjacent to the neck around the pin 2 prevents thebobbin spring from dropping out of the tube bya projection. In ourinvention the shoulder on the pin simply retains the spring from fallingoff, and the paper tube and the thread are pressed against the spring inclosingthe shuttle, the friction being produced byv the paper tube orthe thread itself against the springyso as to dispense with the spooland tube.

We claim as our invention- 1. The combination with the sewing machineshuttle, of a movable disk adapted to be inserted into the shuttle andheld by the friction of the edges of the disk, a central pin upon thedisk for the reception of the thread bobbin, and a spring acting betweenthe disk and the thread bobbin to apply a friction to the latter,substantially as set forth.

2. The combination, in a sewing machine shuttle, of a pin having a neckand shoulder near the end at which it is fastened to the shuttle, aspring having a ring loosely surrounding the neck and retained by theshoulder, and arms extending outwardly and hearing against the interiorof the shuttle, the cavity for the reception of the paper tube andsurrounding thread bobbin being such that chine shuttle, of a removabledisk adapted to be inserted into the shuttle and held by the contact ofits edge with the interior of the shuttle, a central pin connected withthe disk, a spring having a central'hole through which the pin passesand acting between the thread bobbin and the disk to apply a friction tosuch bobbin, substantially as set forth. Signed by us this 12th day ofSeptember, A. D. 1893.

HENRY A. BATES. WM. H. BARNETT. Witnesses:

HERBERT W. KNIGHT, FRANCIS E. Bow.

